Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof

A technology of atmospheric visibility and backscattering, which is applied in the measurement of scattering characteristics, color/spectral characteristics, etc., and can solve the problems of small measurement range, large volume, inconvenient installation and carrying, etc.

Inactive Publication Date: 2007-04-18
NAVAL UNIV OF ENG PLA
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[0005]The receivers and transmitters of these measuring instruments are mostly distributed on both sides, requiring cooperative targets, with large volum

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  • Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof
  • Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof
  • Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof

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[0058] 下面结合附图详细说明本发明的实施情况,但它们并不构成对本发明的限定,同时通过说明本发明的优点将变得更加清楚和容易理解。

[0059]The method of atmospheric visibility measurement based on laser backscattering: it includes the following steps: ① transmit and receive laser backscattering signals five times according to medium gain and high gain respectively, and sample 400 points in each received signal; ② respectively calculate Sampling the extinction coefficient between each fault each time, under the premise of eliminating the larger error point in the fault, calculate the average extinction coefficient of each five groups between the faults; ③ Calculate the overall relative extinction coefficient according to the data fusion algorithm; ④ Calculate the relative extinction coefficient by relative extinction Coefficient inversion to derive atmospheric visibility.

[0060] Based on laser backscattering atmospheric visibility measuring instrument, it includes sequentially connected laser 4, frequency multiplier 3, collimating mirror ...

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Abstract

The invention relates to based on laser backscattering type atmospheric visibility measuring method and apparatus. It includes the following steps: respectively transmitting and receiving laser backscattering signal for five times as middle gain and high gain, sampling 400 points in each the received signal; respectively computing each fault extinction coefficient while sampling, computing its average extinction coefficient for five sets after removing the point with big error; computing whole relative extinction coefficient by data fusion algorithm; deducing the atmospheric visibility by relative extinction coefficient inversion. The invention has the advantages of high measuring precision, little volume, light weight, wide application range, and no collaboration object.

Description

technical field [0001] 本发明涉及一种基于激光后向散射式大气能见度测量的方法,本发明还同时涉及根据该方法设计的大气能见度测量仪。该测量仪主要用于机场、气象、港湾的大气监测以及试验场区、雷达、红外、激光等设备的大气能见度参数定标。 Background technique [0002] 气象能见度(meteorological visibility)作为专业术语,世界气象组织(WMO)是这样定义的:正常视力的人,在白天当时的天气条件下,能够从天空背景中看到和辨认出适当大小黑色目标物的最大距离;在夜间则是指假设亮度与白天相同的情况下能够辨认出目标物的最大距离。可见,气象能见度是表示大气浑浊程度或透明度的一个量。这个量用距离来表示。因此,气象能见度的简单定义为:用距离来表示的大气的浑浊程度(或透明度)称为能见度。 [0003] 能见度的测量对于航空航海、陆上交通、气象以及军事应用都有重大的意义,尤其在军事领域,它是飞机和舰船安全航行、雷达、光电装备定标、军事目标打击等军事行动的重要依据之一。 [0004] 能见度测量仪器是基于上述理论研制出来的。尽管各类仪器的具体结构、测量方法不同,但测量原理基本一致,即利用仪器测得大气消光系数σ,然后通过Koschmieder定律或Allard定律来求得能见度值。从总体结构来看,能见度测量仪器主要由4部分组成,即发射器、接收器、处理器和显示器。常见的能见度测量仪器一般分为3种:透射式、散射式和激光雷达式。 [0005] 这些测量仪的接收端和发射端大都分布在两侧,需要合作目标,具有体积大,成本高,测量范围较小,安装和携带不方便等诸多缺点,很难推广使用。 Contents of the invention [0006] 本发明的目的在于克服上述现有背景技术的不足之处,而提供一种基于激光后向散射式大气能见度测量的方法。 [0007] 本发明的另一个目的在于提供一种根据该方法设计的大气能见度测量仪。该仪器具有测量精度高、体积小、重量轻、应用范围广、无需合作目标等优点。 [0008] 基于激光后向散射式大气能见度测量的方法:它包括如下步骤:①按照中增益和高增益分别五次发射并接收激光后向散射信号,在每次接受的信号中采样400点,②分别计算每次采样各个断层间的消光系数...

Claims

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Application Information

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IPC IPC(8): G01N21/53G01N21/27
Inventor 康圣王江安宗思光蒋冰莉
Owner NAVAL UNIV OF ENG PLA
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